package think.interfaces;

interface I1{void f();}
interface I2{int f(int i);}
interface I3{int f();}

class C{public int f(){return 1;}}

class C2 implements I1,I2{
    public void f(){}
    public int f(int i){return 1;} //重载
}
class C3 extends C implements I2{
    public int f(int i){return 1;} //重载
}
class C4 extends C implements I3{
    public int f(){return 1;}
}
//class C5 extends C implements I1{}
//interface I4 extends I1,I3{}

public class InterfaceCollision {

}
